/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsEditorOnlyExp/Public/BspConversionTool.h
Performs conversion of BrushesToConvert and stores the result in the preview mesh.
true if successful.
bool ComputeAndUpdatePreviewMesh ( [FText](API\Runtime\Core\Internationalization\FText) * ErrorMessage )